package cn.tide.question2.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class Q13Filter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();

//        System.out.println(requestURI);
        if (requestURI.contains("a.jpg")){
            RequestDispatcher requestDispatcher = request.getRequestDispatcher("b.jpg");
            requestDispatcher.forward(request,response);
            return;
        }else {
            filterChain.doFilter(request,response);
        }
    }

    @Override
    public void destroy() {

    }
}
